Greetings,

In my analysis of fine-scale patterns of habitat use by stream fishes in
relation to temperature, I've been confronted with a potential problem.
The temperature recording devices I use absorb solar radiation when
deployed in water <20cm deep, thus record water temperatures greater than
the actual ambient water temperature.  Does anyone know to what degree
body temperatures of fish may be elevated by exposure to direct solar
radiation in shallow water? I've been assuming it's minimal, given
presumed ability of the fish to integrate various sources and sinks of
heat - and that the ambient water temperature (conduction) is the
predominate factor influencing fish body temperature. But I'm no physicist
by any means and might be missing something!

I'd appreciate any replies, and will summarize all responses and post back
here.

Thanks in advance,
Joe

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Joseph L. Ebersole                                   541-737-1979 (office)
Dept. of Fisheries and Wildlife, Nash Hall 104       [log in to unmask]
Oregon State University
Corvallis, OR 97331
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